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3 Sheets-Shet 1. J. DENNIS, W. S.- METGALFE & J. A. SHERMAN.

(No Model.)

GUMMING MECHANISM FOR ENVELOPE MACHINES.

Patented 00b. 27, 1891.

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(No Model.) 3 Sheets-Sheet 2. J. DENNIS, W. S. METOALPE 8: J. A.SHERMAN.

Patented 0012.27, 1891.

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(No Model.) 3 Sheets-Sheet 3.

J. DENNIS, W. S. METGALFZE'. 8: J. A. SHERMAN.

. GUMMING MECHANISM FOR ENVELOPE MACHINES.

No. 462,209. Patented Oct. 27, 1891.

onms Farms 00., mo-nrm'na, WAGNINGYDN n c UNITED STATES PATENT OFFICE.

JOSEPH DENNIS, VILLIAM SHERRAN METCALFE, AND JOHN AMES SHERMAN,

OF WORCESTER, MASSACHUSETTS, ASSIGNORS TO THE \VIHTCOMB EN- VELOPECOMPANY, OF SAME PLACE.

GUMMING MECHANISM FOR ENVELOPE-MACHINES.

SPECIFICATION forming part of Letters Patent No. 462,209, dated October27', 1891.

Application filed June 27, 1890.

To 60% whom it 11mg concern.-

Be it known that we, JOSEPH DENNIs, \VIL- LIAM SHERRAN METoALEE, andJOHN AMES SHERMAN, all of WVorcester, in the county of 5 lVorcester andState of Massachusetts, have invented certain new and usefulImprovements in the Gumming Mechanism of Envelope-"\Iaohines, of whichthe following is a specification.

Our improvement relates to mechanism for giving to one of the pickers ahorizontal movement while it is in contact with the surface of theblank, as well as the ordinary vertical movement necessary to cause itto perform its function of being gummed and transmitting its gum to theblank.

In the drawings is shown at Figure l a front elevation of a mechanismembodying our invention arranged upon the frame of an envelope-machine,so much of the machine being shown as will give a clear understanding ofour invention. Fig. 2 is a side view of the mechanism shown in Fig. 1,part in section on line 0c of Fig. 1, the fly-wheel being removed. Fig.3 is a detail showing the gumbox and the rods on which it travels inplan, the gum-box being uncovered. Fig. 4 is a section on line 50 :r ofFig. 3, but showing the gum-box covered and in addition the position 011one of the pickers. Fig. 5 is a like view showing the gum-box in the actof gumming the picker. Fig. 6 shows the method of lifting the blank, oneof the pickers having been slid off from the gummed surface of thepaper. Figs. 7 and 8 show details enlarged and are referred to below,Fig. 8 being a section on line 00 m of Fig. 7.

A is the frame of the machine, in which is mounted a shaft B, carryingthe pulley B by means of which motion is given to the various parts.

C is a pile of blanks in position to be gummed by the picker or pickersin the ordinary manner, being mounted upon a table C, which may be fedto the gumming' mechanism, if desired, in a way well known to allenvelopemachine makers, and therefore not shown in drawings.

e will describe our invention applied to a machine of the kind in whichthe pickers, having received their supply of gum, descend and eventuallyrise, lifting the blank a suffi- Serial No. 356,935- (No model.)

cient distance from the pile below it to allow the interposition of acarrier or carriage upon which the gummed blank is deposited to beconveyed and submitted to the various processes in the course ofmanufacture.

\Ve have not shown a carriage in the drawings, because its constructionand operation are well known to all skilled in the art. \Ve have showntwo pickersone D mounted in such a way as to embody our invention andarranged to gum the fly-fiap of the envelope, the other D of ordinaryconstruction and mounted to strike the blank and raise it in the mannerabove referred to, being assisted in this operation, if thoughtdesirable, by the picker 1). Both these pickers are hung from a bar E,which cross-bar is mounted on the lower end of avertically-reciprocating bar F. This bar F is mounted in a cross-head f,sliding in ways in the upper part of the frame A of the machine, theupper part of the rod F also passing through the frame. This bar F isreciprocated by means of a clamp F, attached 7 5 thereto, aconnecting-rod F pivoted to the clamp, rocker-arm ,(not shown) connectedto said rod F and mounted on rock-shaft F a second rocker-arm F similarin all respects to the one connecting the rock-shaft F with theconnecting-rod F connecting rod F, lever F and cam F. This motion of therod F gives a vertically-reciprocating movement to both pickers at once.The pickers are shaped at their bottoms according to the shape of thedaub of gum which it is intended shall be deposited upon the blank.

It is customary to use a comparatively narrow daub of gum with which togum the permanently-sealed flap of the envelope, whereas the fly-flap,which is to be stuck by the user of the envelope, is ordinarily given awider daub of gum. It is desirable, however, where this is done, that itshall take no more force to pull the blank off of one picker than off of5 the other, and consequently it is desirable that the liy-tlap pickershall be moved sidewise part way off the blank before the blank islifted, so that the blank when it is lifted shall be held by twopickers, each of which has a too gummed surface of substantially thesame width in cont-act with the blank. One method of accomplishing thisresult is shown in the drawings. \Ve mount our picker D in a frame at,preferably by means of two rods d, which pass up through the frame d andare held in place by pins or nuts d yielding springs (Z and pins d sothat the picker may yield slightly to any unevenness in the pile ofblanks.

This frame d is hung from the rock-shaft G journaled on the upper end ofthe post G mounted on the cross-bar E. The picker is given its rockingmovement from the cam G through the bent lever G, connecting-rod Gbell-crank G connecting-rod G rocker-arm G and rock-shaft G By adjustingthe connection of G and G the length of the rocking motion of the pickermay be adjusted. This may be done by slotting one end of G as shown, andusing a set-screw at the junction G and G and also at the junction ofthe two arms of G so that the angle of these arms may be regulated atwill.

The operation of this part of our invention is as follows: The pickers,having been gu'mmed, descend in such manner as to strike upon theportions of the blank which are to receive the gum. Immediatelythereafter the cam G operates to rock the picker D off or partly offfrom the edge of the blank, as desired, (see Fig. 6,) so as to eitherleave that end of the blank free or to leave it but slightly stuck tothe picker. The rod F, being now raised,lifts both pickers at once, andwith them the top blank, sufliciently high to allow the carriage to passunder the blank, the carriage moving between the top of the pile ofblanks and the under side of the draw-off II. hen the carriage isinposition to receive the blank, the pickers are lifted still farthersayto the position in Fig. l-and the draw-off draws the blank off from thepickers as they rise and allows it to fall onto the carriage, afterwhich the carriage retires and the operations are repeated. This featureis com mon to various well-known machines. After the blank has beenpulled off the pickers the cam G causes the picker D to resume itsformer position in time to be gummed by the gum-box. It is essentialthat the picker have an oscillating movement, so as to raise the cornerof the blank slightly as it slides off from it, and the above seems thesimplest way to give that movement to it.

For the purpose of gumming the pickers we have provided a gunrbox J,which swings or is caused to travel from one side of the machine to theother between each stroke of the pickers in such manner as to gum them.We prefer to mount our gum-box on two rods 3', which extend from oneside of the machine to the other, and are hung from the top bow of theframe A by means of hangersj each of which passes up through a clamp 7'attached to a bracket 7' fastened to the bow of the frame, and is heldin place by a nut j, which screws onto its end, and also by the clampitself, which is tightened by the screw 7' The gum-box is mounted onslides or sleeves j, which run on the rods and by turning the nuts 7'the hangers are shortened 3, so as to contain sufficient gum for allpract-ical purposes and yet remain out of the way of the pickers duringtheir operation at all times during their descent. The box is covered,except where it is provided with rolls K, mounted upon a suitable shaftK, which rolls extend up through the cover, so as to touch the bottomsof the pickers and be rotated by contact therewith as the box travels,this being a convenient way of rotating the gum-roll. This gum-box inpractice, traveling back and forth under the pickers between eachdescent of the pickers, enables the pickers to be gummed with leastpossible waste of time. For this reason we prefer to use it with thesepickers, though other means for gumming them may be adopted. After ithas moved the pickers descend, the daubing-picker moves horizontally,the pickers rise again, the carriage travels under the blank, thepickers continue their upward movement, the daubing-picker moving at thesame time back to its normal place, and then the go m-box travels back,gumming the pickers again.. As shown in the drawings, a spring d pressesthe rocking picker in toward the bar F until the cross-bar d acting as astop, strikes the post G By this means the bottom of the picker is keptnormally horizontal.

WVhat we claim as our invention is 1. In an envelope-machine,incombination, the picker D, above described, mounted upon averticallyreciprocating rock -shaft, and mechanism, substantially asdescribed, whereby said rock-shaft is rciprocated vertically and is alsooscillated in the manner described while at its lowest position, all asand for the purposes set forth.

2. The picker I), attached to rocker-arm.

mounted, as described, upon the rock-shaft G a vertically-reciprocatingpicker-carrier JOSEPH DENNIS. WILLIAM SHERRAN METCALFE. JOHN AMESSHERMAN.

Witnesses:

BENJAMIN FRANKLIN SoUTHwIoK, PHILIP OoLLINs SMITH.

